James tripp



(No Model.)

J. TRIPP.

SHUTTLE AGTUATING MECHANISM FOR, SEWING MAGHINESJ. No. 413,111.

Patented Oct. 15, 1889.

& m Wu fiYENTUR ATTO R N EYS UNITED STATES PATENT FFlCE.

JAMES TRIPP, OF NEW YORK, N. Y.

SHUTTLE-ACTUATING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 413,111, dated October 15, 1889.

Application filed February 18, 1889. Serial No. 300,219. (No model.)

To aZZ whom, it may concern:

Be it known that I, JAMES TRIPP, a citizen of the United States, residing in the city,

county, and State of New York, have invented certain new and useful Improvements in Sh uttle-Operating Mechanism for Sewing-Ma chines, of which the following is a full, clear, and exact description, reference beinghad to the accompanying drawings.

The present invention relates to mechanism for driving rotary or rotarily-oscillating shuttles, and particularly that class of shuttledriving mechanism that carries the shuttle without the aid of a race or other peripheral parts.

The object of the invention is to obviate the difficulties attendant upon the presence of a race for carrying a rotating shuttle that is, to obviate the soiling of the thread, due to the presence of oil necessary to make the shuttle run freely when in a race, and the friction and clogging of the race and wear of the parts due to the gummed oil collecting dirt and lint or flock.

It is also the object of the invention, while supporting and carrying the shuttle concentrically with the shuttle-shaft, to so support it that it shall have no looseness or irregularity of motion and be held against any tendency to have motion along the axis of the shuttle-shaft, or laterally away from the same, thereby permitting a high speed for the shuttle and obviating all tendency of the needlethread to catch and tangle or to break.

The invention consists of cam actuated plungers mounted upon the shuttle-shaft and arranged to reciprocate into and out of corresponding holes in the shuttle, the plungers being arranged so that at least two of them will at all times be inserted in the shuttle and carrying the same.

The invention also consists, in combination with the said plungers and shuttle, of a faceplate arranged in front of the shuttle, which holds it against the longitudinal thrust of the plungers, and of a pressure-plate arranged against the rear face of the shuttle, which holds the shuttle against tendency to rearward motion and is mounted so as to have a slight yielding pressure upon the shuttle.

vation of the shuttle, shuttle face-plate, and surrounding parts. Fig. 2 shows the shuttle and needle-bar in their relative position when the shuttle is positioned as in Figs. 1 and 3. Fig. 3 is a vertical section on plane a: x of Fig. 1. Fig. at is an elevation of the same parts as in Fig. 1, except that the face-plate and shuttle have been removed. Fig. 5 is a section on plane y y of Fig. 4, but also showing the shuttle in position and sectioned by the same plane. Figs. 6 and 7 show the cam parts sectioned 011 plane y y, Fig. 6 being a plan View of the upper parts of the cam, looking upwardly, and Fig. 7 a plan of the lower parts of the cam, looking downwardly.

Referring to these views in detail, A represents the work-plate of 'a sewing-machine; B, a cam-sleeve attached to the under side of plate A and constituting a journal for the shuttle-shaft andparts attached thereto, and

O the shuttle-shaft. Upon the shuttle-shaft are fixed two disks D D, which are circular in form and of the same size as the cylindrical opening in the sleeve B, and which constitute journals for this end of the shuttle-shaft, revolving, as they do, with the shaft in the sleeve. These disks support the plungers E, F, G, and H, which extend in either direction beyond the disks D, and are free to move sleeve, with their rolls always in the camgroove.

L indicates the shuttle, which in general form is of well-known construction. It is pierced with four holes M, which in size and position correspond to the outer ends of the plungers E, F, G, and H, which plungers play in and out of these holes in the shuttle as the shuttle-shaft revolves, thereby carrying the shuttle concentrically with the shuttle-shaft.

L is a hollow post in the shuttle which serves as an axis for the bobbin, the bobbin being of the usual or any suitable form.

0 indicates the shuttle face-plate. This is an open ring-like plate, which is secured by screw P to the cam-sleeve, and rises in front of the shuttle in such position as to bear lightly against its peripheral edge, as seen in Fig. 3, for the purpose of holding the shuttle against any action tending to cause it to move along the line of its axis, such as the thrust of the plungers or any like action.

Q is what I term a pressure-plate. It is in effect a flat ring surrounding the position of the shuttle and bearing against the pe ripheral edge of the shuttle from its rear side, similarly to the face-plate O. This pressureplate is held in position by the screws R, which enter the front face of the cam-sleeve, and are each provided with a spring S, which bears upon the pressure-plate, and thereby keeps it pressed against the heads of the screws R, which screws thereby serve to adjust the plate, so that it will bear upon the shuttle as firmly or as delicately as may be required, while yet permitting it to be push ed away from the shuttle.

' T is the ordinary spring-lever which holds the bobbin and its case in the shuttle.

The action of the parts will now be plain. As the shuttle-shaft revolves, the plungers are caused to move to and from the shuttle, according as the cam-groove deviates. It is to be understood that the cam is so arranged that two of the plungers are always in the shuttle and carrying the same. This is important to the action of the shuttle, as at least two plungers must be in the shuttle to prevent it acting centrifugally and leaving its position concentric with the shuttle-shaft. Thus, taking the parts in position of Fig. l, where the shuttle is about to take the needle-loop just before the shuttle reaches the loop, the plunger nearest the hook will begin to draw out of the shuttle, and by the time the shuttle has made a quarter-turn it will be entirely withdrawn, so that the loop then on the shuttle can pass it, after which, and during substantially the second quarter of the revolution, this plunger will be returned to position in the shuttle and held there during the second half of the revolution. Of course the other plungers are actuated similarly, and hence it will appear that two plungers must always be in the shuttle and carrying it during the time that the other two are being withdrawn to let the loop pass and being again reinserted therein. Accordingly it will be obvious that the plungers may be worked in pairs when there are four of them, as in the present case, by simply shaping the camgroove so that the separate pairs may be properly timed. Similarly, too, if desired, three plungers may be arranged to accomplish the same result; but it is preferred to use four, as that number permits of a better arrangement and working of parts than would a less number of plungers.

The purpose of the face-plate and the pressure-plate is to hold the shuttle against any action tending to displace it from its plane of revolution and to pre' ant any wabbling or irregular movement thereof. The pressure plate, however, is not a necessity. The shuttle may be held between the faceplate and any other suitable part attached to the shuttle-shaft or cam-sleeve; but it is preferred to use the yielding pressureplate shown, as it affords a convenient means for regulating the position of the shuttle and for preserving such a pressure upon its periphery as is suited to best hold it in place.

I do not herein claim, broadly, cam-actuated plungers or pins for carrying a shuttle when the same are arranged and operated so that the shuttle is at all times carried by two or more of the pins or plungers and is held against displacement by a face-plate device,

. for such combination of parts constitutes the subject-matter of an application for patent, No. 275,642, filed by me May 31, 1888, and allowed February 1, 1889; but

\Vhat I do claim as new is- 1. The combination, in a sewing-machine, of a shuttle-shaft, three or more reciprocating plungers mounted upon said shaft, a shuttle provided with holes to receive the plungers,a cam for reciprocating the plungers to and from engagement with the shuttle, and a faceplate to hold the shuttle in its plane of revolution, the parts being arranged so that two of the plungers will at all times be in engagement with and carrying the shuttle, while the other plunger or plungers are being withdrawn to let the needle-loop pass and being again reinserted in the shuttle.

2. The combination, in a sewing-machine, of a shuttle-shaft, three or more reciprocatin g plun gers mounted upon said shaft, a shuttle provided with holes to receive the plungers, a cam for reciprocating the plungersoto and from engagement with the shuttle, a plate arranged to bear against the front face of the shuttle, and a yielding plate arranged to bear upon the rear face of the shuttle, for holding the shuttle in its plane of revolution, the plungers and ca m being arranged so that two of the plungers will at all times be in e11- gagement with and carrying the shuttle.

3. The combination, in a sewing-machine, of a shuttle-shaft, three or more reciprocating plungers mounted upon said shaft, a shuttle provided with holes to receive the plungers, a cam for reciprocating the plungers to and from engagements with the shuttle, and two plates arranged to bear against the peripheral edge of the shuttle upon its front and rear faces for holding the shuttle in its plane of revolution, the plungers and cam being arranged so that two of the plungers will at all times be in engagement with and carrying the shuttle.

JAMES TRIPP.

WVitnesses:

RoB'r. F. GAYLoRD, ERNEST HOPKINSON. 

